Tube frame



March 15,1927.

1,621,452" H. Bm'r MEANS F 0 R REGULATFING THE VOLTAGE 0F DYNAMOS OF VARIABLE SPEED AND'LOA-D I. Filed Aug. 13, 1925 Fig. 1 H92. v

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I. 5 ay") M Patented Mar. 15, 1927.

"UNITED STATES WALTER IBIXBY, on Bos'ron, MASSACHUSETTS, ASSIGNoRToSiI-AWMUT nnsinnnm ING COMPANY, OF BOSTON, MASSACHUSETTS, A" CORPORATIONOF MASSACHUSETTS.

'TUIBE FRAME.

Application filed March e, 1922, Serial No. 541,321.

' This invention is intended tolovereome certain difiiculties that are commonly experienced in the use of tube frames in looms tube that may be injured, sincethe loom muststand idle until a perfect tube is substituted for one that is bent or broken From the necessities of the case, those tubes must be made of light thinstock andyet must be sosupported as to be held firmly in position ag'ainst accidental displacement. Mu ch loss oftime and much trouble IS'QC- casioned by insecure and unreliable methods of supporting the tubes on their carrierv bars and by similarly defective arrange ments for supporting the carrier bar itself.

The presentinvention deals with the probleins byproviding simply constructed and reliable means of attaching and holding the individual tubes in perfect parallelism against accidental displacement, while at the same time any tube eanbe instantly re.-, moved and a new one substituted without appreciable loss of 1 and I further p vides a reliable and secure means of securing the tuft tube carrier bar, which is the.

backbone of the tube frame; to its supporting brackets by a firm and rigidconnection while still preserving the necessary lightness and rigidity of the whole structure.

' tion'will be explained in the following specification and will be definedin the claims hereto annexed. I

. In the accompanying drawings I have illustrated some of the preferred arrangements and constructions embodying the )rinci les of -this invention in'whi'chz, l P e a Figurel'is' a plan view of 'acomplete tube frame and'tuft-carrying spool with the tubes in their horiiontal position, the mid dle portion of the 'spool'and frame being brokenaway. r

- tube with its holding member.

a single piece.

Figure is a'perspective view of one. end portlon ofthe'same.

@Figure 3 is a detail viewin transverse section of one end of the carrier bar. Flgure 4 1s a cross sectional View of-the carrier bar and the tube-attaching means adjacent notches orin'dentations for interlocking the Figure 9 is a side elevation of the tube shown in Figure 8.

Figure 10 is a cross section of such-tube. Figures 11 and 12 Show slightly modified forms'of individual tubes in cross-section and elevation respectively, in which theengaging orinterlo'cking notch is in the form so i of a slotperforatingone side of thetube.

Figure 13 shows in perspective'one of' tuft tubes"interlo'cked vvith a modified form of'combined holder and carrier bar made in Fignre' lt is a cross section showing the tuft tube'holder secured to a hollow metallic carrier bar. 1' 7 In considering the means by which the indiv dual tuft-tubes are firmly supported in pr per relationship. so asto render them individually replaceable, there are two character stic" novel "features 1n the arrangement to be described one of them relating to the 7 means bywliieh the tuft tubes are so sup: These and other features of the 1nve'nspool-or in the direction of the intake ends of therow of tubes. 7

As shown in' Figures land 2, the tube frame comprises a longitudinal carrier memauxiliary resistances l0, 10',etc., and several switches 11, 11', etc., for vtheseresistances. A necessary condition in this case is that the electro-magnets 13, 13, etc., controlling the switches should. be regulated in such manner as to act successively and'at the to the terminals of the field winding 2, in

lieu of being branched the resistance 3. In this case the order of the operations of closing and opening the switches 11, 11, should be determined in such manner that when the speed of the dynamo increases, the switch 11 first opens and the switch 11 closes later; when'the speed of the dynamo to the terminals offalls the switch 11' should open first and the switch 11 close later. I

In all cases there should be utilized. the voltage at the terminals of the field winding itself to cause the operation of the switches 11, 11 etc., and it would be sufiicient to change the direction'ot' action of the springs and of the elec'tro-magnets of these switches.

As indicated in Fig. 4, it may even be advantageous to branch the electro-magnet 13 of the switch ll to the terminals of the resistance 3 and the electro-magnet'13 of the switch 11' to the terminals of the field magnets.

Fig. 5 shows another variant of the particular arrangement forming the subject of the present invention. In this variant a resistance lti'in series with the resistance 3, (and consequently with the field winding 2) may be short-cirfliited or put in circuit by the automatic switch '11. The circuit of the coil 13 and of its resistance 15 is branched in shunt to the terminals of both of the resistances 3, 1G, in series with the field winding 2.

The operation of the device in the arrangement referred to will'be easily followed, having regard to the explanations given in connection with the arrangement shown in Fig. 1. v

For dynamos of a certain, power there may be used two or more than two resistances 16, 16,'etc., (see Fig. '6) and as many corresponding'switches 11, 11', with the double condition of exciting each .01v the electro-magnets of these switches by means of a coil under the influence of the dilfer- 'the whole of the resistance 13, 1(5, 16' etc.

Fig. .(5 illustrates arrangement. I. 5 r Having ,now particularly described'and ascertained the nature of my said invention an example of the latter and in what manner the same is to be performed, I-deelare that what I claim is:

1. Means for regulating the voltage of dynamos of variable speed and variable load, with vibrating regulators having two contacts, comprising in combination with a dynamo having a field winding and a resistance in series with the field winding, a second resistance branched in parallel with saidfirst resistance, an electromagnetic automatic switch in the connection between the second resistance and the field winding,

the magnetof said switch having 'its'ter minals connected to the terminals of the first named resistance, whereby said magnet is under the influence of the'difierence of potential at the terminals of the resistance in the field winding.

2. Means for regulating the voltage of dynamos of variable speed and variable load, with vibrating regulators having two contacts, comprising in combination with a dynamo having a field winding-and a re-' sistance in series with the field winding, a second resistance branched in parallel with said field winding, an electro-magnetic'automatic switch in the connection between the second resistance and the field winding, the magnet of said switch having its terminals connected to the terminals of one of the elements of the field winding, whereby said magnet is under the influence of the difference of potential at the terminals of said element.

In witness whereof I have hereunto set my hand.

HENRI BENIT.

a pair of aligned slots in said holding members and having detachable interlocking engagement with one of the holding members to prevent accldental displacement in an axial direction, substantially as described.

2. In a tube frame, the combination of a carrier bar provided with two slotted holding members extending in parallelism longitudinally of the bar and projecting laterally from the bar to afford forward and rear supporting means for spacing and holding a series of tuft tubes at equally spaced intervals intermediate of their ends by means of the tube engaging inside edges of scribed.

4. In a tube frame, the combination of a longitudinal carrier bar, tube retaining means projecting laterally therefrom to sur round and support in spaced relation a series of tuft tubes by external engagement with each individual tube at its middle and at its rear portions respectively, each tube being detachab'ly held in operative position to permit its separate removal, substantially as described. i

5.'In a tube frame, the combination of a carrier bar, longitudinal parallel holding members each provided with a series of tube surroundeding apertures, registering with those in the other holding member in the axial direction of the tubes, a series of tuft tubes inserted through said apertures and detachably held therein so as to permit re moval of any tube without disturbing other tubes, substantially as described.

7 6. In a tube frame, the combination of a longitudinalcarrier bar provided withtube supporting and spacing members. a series of separate tuft tubes each provided with a locking notch formed in its side wall intermediate of its ends to engage and detachably interlock with the said holding members to prevent axial displacement while permitting the separate removal of any individual tube without disturbing others, substantially as described.

7. In a tube frame, the combination of a longitudinal carrier bar, tube holding means length, a series of tuft tubes provided interme'diat'e' of their ends with notches adapted to interlock with said holding mean'sto prevent axial displacement and permit separate removal of any tube, substant'ially'as described. a 1' 8. A self-lockingtuft tube for a tube frame, embracing a tubular tuft guide of .flat-tened cross-section whose side wall is provided with a notch adapted toengage an external holding member to prevent axial displacement, substantially as described.

' 9. A self-locking tuft tube for a tube frame, embracing in its construction a tube of spring metal one of whose'side walls is provided I with a notch cooperatively arranged to yieldingly engagethe edge of an external holding member, to. be detachably locked against axial displacement, substantially as described.

10. In a tube frame for weaving, the com bination of a carrier bar, tube holding means for securing a series of mechanically detachable tuft tubes in parallelism transl versely of the bar, and a guard member extending beneath the intake ends of the tubes and formed to project outwardly beyond the adjacent end edgesof the tube to guide the yarn entering the tube out of contact with said end edges while permitting the removal of individual tuft tubes, substantially as described.

11. In a tube frame for weaving, the combination of a carrier-bar, a longitudinal tube-holding member secured against;

the front of said carrier-bar, a series of tuft tubes detachably inserted in said holding member across the front of the bar, and a transversely bowed longitudinal anti-chafing memberdetachably securedbetween the front face of the bar and the rear ends of the tubes so as to deflect the yarn entering the tuft tubes from the, rear end edges of the tubes, substantiallyas described.

12, A tuft tube guide for delivering a yarn tuft to the fabric being woven open at its ends to permit the feeding of theyarn through it and having a side wall provided intermediate of said end openings with means for locking it detachably to its hold ing member, substantially as described.

13. In a tube frame for weaving the combination of a longitudinal carrier bar, alongit-udinal tube carrying member secured to the carrier bar and having itsforward and rearward edges outwardly turned away from the bar to form parallel tube holding ledges and a series of tubes detachably inserted insaid ledges to lie transversely thereof in parallelism with one another, substantially as described.

14. A suspensionhangerfor supporting the yarn-spool and the tube-carrying bar of a tube frame in operative relationship, embracinga vertical .arm'provided with spool- & 1,621,453

supporting and chain-engaging members transversely of the carrier bar and adapted and having at its lower end laterally proto receive clamping screws in order to he 10 jecting individually yielding attaching firmly secured to said carrier bar, substanmemhers angularly disposed to one another tially as described.

and arranged to form a oontractible box in In Witness whereof, I have subscribed lapped engagement with corresponding faces the above specification.

of the carrier bar to prevent displacement between the carrier. bar and the hanger WALTER BIXBY.. 

